/*
    Copyright (C) 1999 Paul Barton-Davis

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

*/

#ifndef __pbd_gtk_ui_h__
#define __pbd_gtk_ui_h__

#include <string>
#include <map>

#include <stdint.h>
#include <setjmp.h>
#include <pthread.h>

#ifdef interface
#undef interface
#endif

#include <glibmm/thread.h>

#include <gtkmm/widget.h>
#include <gtkmm/style.h>
#ifndef GTK_NEW_TOOLTIP_API
#include <gtkmm/tooltips.h>
#endif
#include <gtkmm/textbuffer.h>
#include <gtkmm/main.h>
#include <gdkmm/color.h>

#ifndef ABSTRACT_UI_EXPORTS
#define ABSTRACT_UI_EXPORTS
#endif
#include "pbd/abstract_ui.h"
#include "pbd/ringbufferNPT.h"
#include "pbd/pool.h"
#include "pbd/error.h"
#include "pbd/receiver.h"

#include "gtkmm2ext/visibility.h"

class Touchable;

namespace Gtkmm2ext {

class TextViewer;
class Bindings;

extern BaseUI::RequestType NullMessage;
extern BaseUI::RequestType ErrorMessage;
extern BaseUI::RequestType CallSlot;
extern BaseUI::RequestType TouchDisplay;
extern BaseUI::RequestType StateChange;
extern BaseUI::RequestType SetTip;
extern BaseUI::RequestType AddIdle;
extern BaseUI::RequestType AddTimeout;

struct LIBGTKMM2EXT_API UIRequest : public BaseUI::BaseRequestObject {

     /* this once used anonymous unions to merge elements
	that are never part of the same request. that makes
	the creation of a legal copy constructor difficult
	because of the semantics of the slot member.
     */

    Touchable *display;
    const char *msg;
    Gtk::StateType new_state;
    int (*function)(void *);
    Gtk::Widget *widget;
    Transmitter::Channel chn;
    void *arg;
    const char *msg2;

    UIRequest () {
            type = NullMessage;
    }

    ~UIRequest () {
	    if (type == ErrorMessage && msg) {
		    /* msg was strdup()'ed */
		    free (const_cast<char *>(msg));
	    }
    }
};

class LIBGTKMM2EXT_API UI : public AbstractUI<UIRequest>
{
  private:
	class MyReceiver : public Receiver {
	  public:
		MyReceiver (UI& ui) : _ui (ui) {}
		void receive (Transmitter::Channel chn, const char *msg) {
			_ui.receive (chn, msg);
		}
	  private:
		UI& _ui;
	};

	MyReceiver _receiver;

  public:
	UI (std::string, std::string, int *argc, char **argv[]);
	virtual ~UI ();

	static UI *instance() { return theGtkUI; }

	/* receiver interface */

	void receive (Transmitter::Channel, const char *);

	/* Abstract UI interfaces */

	bool caller_is_ui_thread ();

	/* Gtk-UI specific interfaces */

	bool running ();
	void quit    ();
	int  load_rcfile (std::string, bool themechange = false);
	void run (Receiver &old_receiver);

	void set_state (Gtk::Widget *w, Gtk::StateType state);
	void popup_error (const std::string& text);
	void flush_pending (float timeout = 0);
	void toggle_errors ();
	void show_errors ();
	void dump_errors (std::ostream&);
	void touch_display (Touchable *);
	void set_tip (Gtk::Widget &w, const gchar *tip);
	void set_tip (Gtk::Widget &w, const std::string &tip);
	void set_tip (Gtk::Widget *w, const gchar *tip, const gchar *hlp="");
	void idle_add (int (*func)(void *), void *arg);

	Gtk::Main& main() const { return *theMain; }

	template<class T> static bool idle_delete (T *obj) { delete obj; return false; }
	template<class T> static void delete_when_idle (T *obj) {
		Glib::signal_idle().connect (bind (slot (&UI::idle_delete<T>), obj));
	}

	template<class T> void delete_in_self (T *obj) {
		call_slot (boost::bind (&UI::delete_in_self, this, obj));
	}

	Gdk::Color get_color (const std::string& prompt, bool& picked, const Gdk::Color *initial = 0);

	/* starting is sent just before we enter the main loop,
	   stopping just after we return from it (at the top level)
	*/

        virtual int starting() = 0;

	sigc::signal<void> theme_changed;

	static bool just_hide_it (GdkEventAny *, Gtk::Window *);
	static float ui_scale;

	Gtkmm2ext::Bindings* global_bindings;

  protected:
	virtual void handle_fatal (const char *);
	virtual void display_message (const char *prefix, gint prefix_len,
			Glib::RefPtr<Gtk::TextBuffer::Tag> ptag, Glib::RefPtr<Gtk::TextBuffer::Tag> mtag,
			const char *msg);

  private:
	static UI *theGtkUI;

	bool _active;
	Gtk::Main *theMain;
#ifndef GTK_NEW_TOOLTIP_API
	Gtk::Tooltips *tips;
#endif
	TextViewer *errors;
	Glib::RefPtr<Gtk::TextBuffer::Tag> error_ptag;
	Glib::RefPtr<Gtk::TextBuffer::Tag> error_mtag;
	Glib::RefPtr<Gtk::TextBuffer::Tag> fatal_ptag;
	Glib::RefPtr<Gtk::TextBuffer::Tag> fatal_mtag;
	Glib::RefPtr<Gtk::TextBuffer::Tag> info_ptag;
	Glib::RefPtr<Gtk::TextBuffer::Tag> info_mtag;
	Glib::RefPtr<Gtk::TextBuffer::Tag> warning_ptag;
	Glib::RefPtr<Gtk::TextBuffer::Tag> warning_mtag;

	static void signal_pipe_callback (void *, gint, GdkInputCondition);
	void process_error_message (Transmitter::Channel, const char *);
	void do_quit ();

	Glib::Threads::Mutex   error_lock;
	std::list<std::string> error_stack;

	void color_selection_done (bool status);
	bool color_selection_deleted (GdkEventAny *);
	bool color_picked;

	void do_request (UIRequest*);

};

} /* namespace */

#endif /* __pbd_gtk_ui_h__ */